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authorPeter Zijlstra <peterz@infradead.org>2017-05-19 13:58:25 +0300
committerIngo Molnar <mingo@kernel.org>2017-05-23 11:01:32 +0300
commit6c8557bdb28df3ae97476c5e2aed6373cd235aab (patch)
tree2b134869f2f58494ac3ae664cf6403cb4ff2cbff /include/linux/cpumask.h
parent3fc5b3b6a80b2e08a0fec0056208c5dff757e547 (diff)
downloadlinux-6c8557bdb28df3ae97476c5e2aed6373cd235aab.tar.xz
smp, cpumask: Use non-atomic cpumask_{set,clear}_cpu()
The cpumasks in smp_call_function_many() are private and not subject to concurrency, atomic bitops are pointless and expensive. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/cpumask.h')
-rw-r--r--include/linux/cpumask.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index a21b1fb9a968..4bf4479a3a80 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -293,6 +293,12 @@ static inline void cpumask_set_cpu(unsigned int cpu, struct cpumask *dstp)
set_bit(cpumask_check(cpu), cpumask_bits(dstp));
}
+static inline void __cpumask_set_cpu(unsigned int cpu, struct cpumask *dstp)
+{
+ __set_bit(cpumask_check(cpu), cpumask_bits(dstp));
+}
+
+
/**
* cpumask_clear_cpu - clear a cpu in a cpumask
* @cpu: cpu number (< nr_cpu_ids)
@@ -303,6 +309,11 @@ static inline void cpumask_clear_cpu(int cpu, struct cpumask *dstp)
clear_bit(cpumask_check(cpu), cpumask_bits(dstp));
}
+static inline void __cpumask_clear_cpu(int cpu, struct cpumask *dstp)
+{
+ __clear_bit(cpumask_check(cpu), cpumask_bits(dstp));
+}
+
/**
* cpumask_test_cpu - test for a cpu in a cpumask
* @cpu: cpu number (< nr_cpu_ids)